Portable speaker



FIG. 1 is a front, side, top, perspective view of a portable speaker showing my new design;

FIG. 2 is a rear, side, top, perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof,

FIG. 7 is a side view thereof, the opposite side view being a mirror image;

FIG. 8 is a cross-sectional view thereof along line 8—8 in FIG. 3; and,

FIG. 9 is a cross-sectional view thereof along line 9—9 in FIG. 5.

The broken lines in the drawings illustrate environmental material that forms no part of the claimed design. 

The ornamental design for a portable speaker, as shown and described. 